633326728 has 8 divisors (see below), whose sum is σ = 1187487630. Its totient is φ = 316663360.

The previous prime is 633326723. The next prime is 633326731. The reversal of 633326728 is 827623336.

It can be written as a sum of positive squares in only one way, i.e., 514473124 + 118853604 = 22682^2 + 10902^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×633326728² = 802205488798371968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (633326723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39582913 + ... + 39582928.

Almost surely, 2^633326728 is an apocalyptic number.

It is an amenable number.

633326728 is a deficient number, since it is larger than the sum of its proper divisors (554160902).

633326728 is a wasteful number, since it uses less digits than its factorization.

633326728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79165847 (or 79165843 counting only the distinct ones).

The product of its digits is 217728, while the sum is 40.

The square root of 633326728 is about 25165.9835492277. The cubic root of 633326728 is about 858.7681697143.

The spelling of 633326728 in words is "six hundred thirty-three million, three hundred twenty-six thousand, seven hundred twenty-eight".